Anonymization Based on Improved Bucketization (AIB): A Privacy-Preserving Data Publishing Technique for Improving Data Utility in Healthcare Data

Data sharing is essential in present biomedical research. A large quantity of medical information is gathered and for different objectives of analysis and study. Because of its large collection, anonymity is essential. Thus, it is quite important to preserve privacy and prevent leakage of sensitive information of patients. Most of the Anonymization methods such as generalisation, suppression and perturbation are proposed to overcome the information leak which degrades the utility of the collected data. During data sanitization, the utility is automatically diminished. Privacy Preserving Data Publishing faces the main drawback of maintaining tradeoff between privacy and data utility. To address this issue, an efficient algorithm called Anonymization based on Improved Bucketization (AIB) is proposed, which increases the utility of published data while maintaining privacy. The Bucketization technique is used in this paper with the intervention of the clustering method. The proposed work is divided into three stages: (i) Vertical and Horizontal partitioning (ii) Assigning Sensitive index to attributes in the cluster (iii) Verifying each cluster against privacy threshold (iv) Examining for privacy breach in Quasi Identifier (QI). To increase the utility of published data, the threshold value is determined based on the distribution of elements in each attribute, and the anonymization method is applied only to the specific QI element. As a result, the data utility has been improved. Finally, the evaluation results validated the design of paper and demonstrated that our design is effective in improving data utility.

Study on Mutual Feedback Mechanism and Stability Control of Toppling Slope and Tunnels with High Excavation Rate

During the construction of large-scale hydropower projects in deep mountain gorge areas of the Western China, the difficulties, such as uncontrollable large deformation, great deformation caused by small disturbance, are often encountered in the process of implementation. In particular, due to the limitation of topography, geological conditions and the layout of structures, the slope and dense tunnel group with large section need to be excavated simultaneously in the toppling rock mass. The feedback action mechanism between slope and tunnel excavation is complicated and the deformation control of toppling rock is difficult, which leads to great challenges to engineering construction. In MW hydropower project in west of China, the intake slope, the spillway channel slope, four headrace tunnels, and the sand flushing tunnel, as well as the construction traffic tunnel are arranged in Huishi Ridge on the left bank, where two high slopes and six lager cross-section tunnels are simultaneously excavated and the excavation rate in the toppling deformation rock mass is over 50%, moreover, the lateral coverage thickness of tunnel body is less than the diameter of the tunnel, which leads to the great difficulty of stability control. The excavation stability and safe of the thin mountain ridge is the vital issue to the success of the whole project. Based on the study of the physical and mechanical parameters of toppling rock mass of MW HPP, the mutual feedback mechanism of toppling slope and tunnel group is revealed, an excavation method involving horizontal partitioning, vertical layering, reserving rock plug and reasonable skipping warehouse is proposed. Monitoring results shows that the slope and surrounding rock of the tunnels are stable during the operation period. The research of this paper based on the MW HPP can provide reference for other similar projects.

Data Mining-Based Privacy Preservation Technique for Medical Dataset Over Horizontal Partitioned

The valuable information is extracted through data mining techniques. Recently, privacy preserving data mining techniques are widely adopted for securing and protecting the information and data. These techniques convert the original dataset into protected dataset through swapping, modification, and deletion functions. This technique works in two steps. In the first step, cloud computing considers a service platform to determine the optimum horizontal partitioning in given data. In this work, K-Means++ algorithm is implemented to determine the horizontal partitioning on the cloud platform without disclosing the cluster centers information. The second steps contain data protection and recover phases. In the second step, noise is incorporated in the database to maintain the privacy and semantic of the data. Moreover, the seed function is used for protecting the original databases. The effectiveness of the proposed technique is evaluated using several benchmark medical datasets. The results are evaluated using encryption time, execution time, accuracy, and f-measure parameters.

An Early CU Partition Mode Decision Algorithm in VVC Based on Variogram for Virtual Reality 360 Degree Videos

360-degree videos have become increasingly popular with the development of virtual reality (VR) technology. These videos are converted to a 2D image plane format before being encoded with standard encoders. To improve coding efficiency, a new generation video coding standard has been launched to be known as Versatile Video Coding (VVC). However, the computational complexity of VVC makes it time-consuming to compress 360-degree videos of high resolution. The diversity of CU partitioning modes of VVC greatly increases the computational complexity. Through statistical experiments on ERP videos, it is found that the probability of using horizontal partitioning for such videos is greater than that of vertical partitioning. The empirical variogram combined with Mahalanobis distance is proposed to measure texture orientation information. The experimental results show that the algorithm saves 32.13% of the coding time with only 0.66% BDBR increasing.

CORRELATIONS AND QUERY PROCESSING

It is known that optimization of join queries based on average selectivities is sub-optimal in highly correlated databases. Relations are naturally divided into partitions , each partition having substantially different statistical characteristics in such databases. It is very compelling to discover such data partitions during query optimization and create multiple plans for a given query , one plan being optimal for a particular combination of data partitions. This scenario calls for the sharing of state among plans, so that common intermediate results are not recomputed. We study this problem in a setting with a routing-based query execution engine based on eddies. Eddies naturally encapsulate horizontal partitioning and maximal state sharing across multiple plan. The purpose of this paper is to present faster execution time over traditional optimization for high correlations, while maintaining the same performance for low correlations.

Arched gables (zakomara) temple of the ХІІ century. Regional traditions

Speaking about an originality of the early stages of development of Ancient Rus architecture in comparison with Byzantine architecture, the first thing mentioned is the usage of several domes. However, the decorative arched gables (zakomara), that became attribute of Ancient Rus arched gables temple, yet unknown in Byzantium, are almost not being mentioned. St. Sofia Cathedral in Novgorod represents the initial formation stage of such type of temple (A. Komech). The earliest decorative arched gable (zakomara) found has been preserved in this Novgorod cathedral. The process of formation of the arched gables temple happened in Kyiv in the second half of the ХІ century. St. Michael's Golden-Domed cathedral and Trinity gateway church of the Pechersk monastery in Kyiv are indicative of complete forms of arched gables temple. These two temples were constructed almost at the same time at the beginning of the ХІI century, but they represent the initial stages of different directions of the arched gables temple development. Both temples have one dome. But St. Michael's Cathedral has the form of a parallelepiped, statics of which is emphasized on the meander located at the level chorus (but for the east apses) and also horizontal ranks of windows and niches on all its facades. Trinity church has a vertical volume without any horizontal partitioning. Temples, similar in composition to Dormition cathedral of the Pechersk monastery and St. Michael's Golden-Domed cathedral in Kyiv, were built in Chernihiv at the first quarter of the ХІІ century. Chernihiv temples, unlike Kyiv temples, were built only from brick in the «оpus isodos» building technique, using Romanesque structural components and decorative elements (cross vaults, semi-columns on lesenes, lombard band, perspective portals). In Novgorod after completion of the St. Sophia cathedral the tradition of stone construction was renewed at the beginning of the ХІІ century. The remained Novgorod temples of this period have complete arched gables forms with vertical layout of the volumes and several domes. During the XІІ century, there are two kinds of the Novgorod variant of the zakomara temple in Pskov and Staraya Ladoga. Walls of the Novgorod, Pskov, and Staraya Ladoga temples were built in mixed building technique from brick and stone. In the Vladimiro-Suzdalsky principality from the middle of the XІІ century, the temples presented a connection of several composite variants of the arched gables type and other options of the Romanesque building technique (hewn quadrants of limestone) and the Romanesque decorative elements. The Chernihiv variant of arched gables temple became interregional, but kinds of Novgorod variant and Vladimiro-Suzdal variant were local. Temples, similar to the Chernihiv temples, were built in Kyiv, Kanev, Vladimir-Volynsk, Smolensk, Pereiaslav from the second quarter of the ХІІ century. This variant of arched gables temple prevailed until the end of the XІІ century when it was displaced by a new interregional tower-shaped temple type with the step raised arches. Arched gables temple represented the main way of development of Ancient Rus architecture of the XІІ century, but there were other traditions which are presented by single remained or partially remained monuments.